An IPv6-IPv4 compatibility aggregatable global unicast address format for incremental deployment of IPv6 nodes within IPv4
First Claim
1. An address format for achieving address compatibility between a previous version and a new version of Internet Protocol (IP), comprising:
- a prefix address portion containing a globally aggregatable IP address prefix; and
an interface identifier portion concatenated to the prefix portion and containing an embedded IP address assigned according to the previous IP version, the concatenation of the prefix address portion and the interface identifier portion forming an address that is compatible with the new IP version and enables packets to be routed to addresses assigned according to the previous IP version.
1 Assignment
0 Petitions
Accused Products
Abstract
Described is an IPv6-IPv4 compatibility global aggregatable unicast address format that enables incremental deployment of IPv6 hosts and routers within predominantly IPv4 based networks. A globally aggregatable IPv6 address prefix is associated with an IPv4 node having an IPv4 address and deployed in the network. The IPv4 node is configured with an IPv6-IPv4 compatibility address that includes a prefix portion and an interface identifier portion. The prefix portion contains the IPv6 address prefix associated with the IPv4 node and the interface identifier portion contains the IPv4 address. Packets addressed to the IPv6-IPv4 compatibility address of the IPv4 node are routed across IPv6 infrastructure using the IPv6 prefix portion or tunneled across IPv4 infrastructure using the IPv4 address embedded in the interface identifier portion.
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Citations
8 Claims
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1. An address format for achieving address compatibility between a previous version and a new version of Internet Protocol (IP), comprising:
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a prefix address portion containing a globally aggregatable IP address prefix; and
an interface identifier portion concatenated to the prefix portion and containing an embedded IP address assigned according to the previous IP version, the concatenation of the prefix address portion and the interface identifier portion forming an address that is compatible with the new IP version and enables packets to be routed to addresses assigned according to the previous IP version. - View Dependent Claims (2, 3, 4, 5)
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6. A method for enabling incremental deployment of Internet Protocol version 6 (IPv6) in a network having Internet Protocol version 4 (IPv4) nodes, comprising:
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associating a globally aggregatable IPv6 address prefix with an IPv4 node having an IPv4 address and being deployed in the network;
configuring the IPv4 node with an IPv6-IPv4 compatibility address that includes a prefix portion containing the IPv6 address prefix and a interface identifier portion containing the IPv4 address of the IPv4 node. - View Dependent Claims (7, 8)
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Specification